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Finding the Fourth Proportional to 487,221.57, 730,873.13 and 127,391.74

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Solution

The fourth proportional to 487,221.57, 730,873.13 and 127,391.74 is: 191,098.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,221.57 : 730,873.13 = 127,391.74 : x
  2. Step 2: Convert to fraction form
    487,221.57/730,873.13 = 127,391.74/x
  3. Step 3: Cross multiply
    487,221.57x = 730,873.13 × 127,391.74
  4. Step 4: Simplify right side
    487,221.57x = 93,107,197,285.80
  5. Step 5: Solve for x
    x = 93,107,197,285.80/487,221.57
  6. Step 6: Final answer
    x = 191,098.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.